278265455

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1\times {\mathrm{701}}^1$

素因数の和:947

約数の個数: 32

約数和(自身を含む): 373621248

約数和(自身を除く): 95355793

約数列:

[1, 5, 13, 31, 65, 155, 197, 403, 701, 985, 2015, 2561, 3505, 6107, 9113, 12805, 21731, 30535, 45565, 79391, 108655, 138097, 282503, 396955, 690485, 1412515, 1795261, 4281007, 8976305, 21405035, 55653091, 278265455]

約数ペア:

[(1, 278265455), (5, 55653091), (13, 21405035), (31, 8976305), (65, 4281007), (155, 1795261), (197, 1412515), (403, 690485), (701, 396955), (985, 282503), (2015, 138097), (2561, 108655), (3505, 79391), (6107, 45565), (9113, 30535), (12805, 21731)]